Plot instance (each row in a feature data file) with bar chart, so taht easy to analyze and compare features for different instances.

Source: R/mhealth.plot.R 
mhealth.plot_instance(df, select_cols, group_cols = NULL, ncols = 4,
  nrows = NULL, as_gg_list = FALSE)

Arguments

df

feature set file
select_cols

selected cols for input data frame to be plotted.
group_cols

group cols that contains extra information about the row to be displayed
ncols

number of columns in the subplot layout per page. Default is 4 columns.
nrows

number of rows in the subplot layout per page. Default is NULL, which will be calculated automatically by `ncols`, so that ncols * nrows >= total number of subplots. But it should not exceed 6 per page.